EP 0317531 B1 19930825 - METHOD OF DISPOSING A POLARIZATION DIRECTING OPTOELECTRONIC COUPLER AND A COUPLER FOR CARRYING OUT THE METHOD
Title (en)
METHOD OF DISPOSING A POLARIZATION DIRECTING OPTOELECTRONIC COUPLER AND A COUPLER FOR CARRYING OUT THE METHOD
Publication
Application
Priority
- SE 8704606 A 19871120
- SE 8801991 A 19880527
- SE 8801992 A 19880527
Abstract (en)
[origin: EP0317531A1] Polarization directing optoelectronic coupler on a wafer of doubly refracting material with an optical axis (Z). The coupler has an interaction region (L1) with waveguides (3,4) and an electrode means. The interaction region (L1) is divided into two sections (S1, S2) with a central electrode (6; 9) and two outer electrodes (5, 7; 8, 10) in each section. Voltage sources (12, 13, 14; 15, 16, 17) are connected to the electrodes and generate electrical fields through the waveguides (3,4). The electrical field between the outer electrodes (5,7; 8,10) has in each section (S1, S2) the same direction in both waveguides and achieves an DELTA chi modulation. The electrical field between the central electrode (6;9) and outer electrodes (5, 7; 8, 10) has mutually reverse direction in both waveguides in the sections (S1, S2) and achieves a DELTA beta modulation. For an arbitrarily polarized lightwave (P), both the crossover state and the bar state can be achieved for both the TE and TM modes or one of its oscillation modes (TM) can be crossed over and the other of its oscillation modes (TE) can be coupled straight through. The directional coupler can be driven at low voltages and the required manufacturing accuracy is relatively low.
IPC 1-7
IPC 8 full level
G02B 6/12 (2006.01); G02B 6/126 (2006.01); G02F 1/31 (2006.01); G02F 1/313 (2006.01); G02F 1/01 (2006.01)
CPC (source: EP US)
G02B 6/126 (2013.01 - EP US); G02F 1/3132 (2013.01 - EP US); G02F 1/0144 (2021.01 - EP US); G02F 2201/125 (2013.01 - EP US); G02F 2203/06 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0317531 A1 19890524; EP 0317531 B1 19930825; DE 3883492 D1 19930930; DE 3883492 T2 19931223; JP 2538007 B2 19960925; JP H01155323 A 19890619; US 4917449 A 19900417
DOCDB simple family (application)
EP 88850350 A 19881019; DE 3883492 T 19881019; JP 29223488 A 19881118; US 27026488 A 19881114